This is the 6910th most frequent Portuguese word.
isa
"Isa" is a common nickname or shorthand for the name "Isabela" or "Isaura" in Portuguese.
In this sentence, 'Isa' is used as a proper noun, referring to a person's name.
Isa é uma ótima amiga minha.
Isa is a great friend of mine.
Here, 'essa' is a demonstrative adjective meaning 'this', showing the proximity of the solution being discussed.
Essa solução me parece muito eficaz.
This solution seems very effective to me.
In this sentence, 'ISA' represents an acronym for an organization or a standard in a technical context.